I love that Sami is, for the most part, absolutely right about Nick/Gabi but it's impossible for her to be right without becoming a total harpy which, in turn, causes no one to want to believe her because she's SAMI.

Except she's not right about Gabi. She's right about Nick, but even Gabi doesn't know what Nick is up to. Since the truth came out at the wedding, Gabi has been willing to have Will be a part of things. She was even happy that they appeared to work things out.